On Tue, Feb 13, 2007 at 11:18:57AM +0530, Srivatsa Vaddagiri wrote:
> Which make me wonder why we need task_lock() at all ..I can understand
> the need for a lock like that if we are reading/updating multiple words
> in task_struct under the lock. In this case, it is used to read/write
> just one pointer, isnt it? I think it can be eliminated all-together
> with the use of RCU.
I see that cpuset.c uses task_lock to read/write multiple words
(cpuset_update_task_memory_state) ..So yes it is necessary in attach_task() ..
--
Regards,
vatsa
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